Home / 28,712.53-43,006.46-13,890.36

Finding the Fourth Proportional to 28,712.53, 43,006.46 and 13,890.36

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Solution

The fourth proportional to 28,712.53, 43,006.46 and 13,890.36 is: 20,805.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,712.53 : 43,006.46 = 13,890.36 : x
  2. Step 2: Convert to fraction form
    28,712.53/43,006.46 = 13,890.36/x
  3. Step 3: Cross multiply
    28,712.53x = 43,006.46 × 13,890.36
  4. Step 4: Simplify right side
    28,712.53x = 597,375,303.55
  5. Step 5: Solve for x
    x = 597,375,303.55/28,712.53
  6. Step 6: Final answer
    x = 20,805.39

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.